$113 Cheap Flights from Harrisburg (MDT) to Washington (IAD)

View $113 flight on Sat, Aug 23, 2025Opens in a new window

Popular airlines from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from Harrisburg to Washington (MDT-IAD)

Prices were available within the past 7 days and start at $113 for one-way flights and $179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Aug 22 - Sun, Aug 24
MDT
Harrisburg
IAD
Washington
$179 Roundtrip, found 13 hours ago
$179
Roundtrip
found 13 hours ago
Select United flight, departing Fri, Aug 22 from Harrisburg to Washington, returning Sun, Aug 24, priced at $179 found 13 hours ago
United
Sun, Nov 23 - Sat, Nov 29
MDT
Harrisburg
IAD
Washington
$181 Roundtrip, found 1 day ago
$181
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 23 from Harrisburg to Washington, returning Sat, Nov 29, priced at $181 found 1 day ago
United
Sun, Nov 23 - Sat, Nov 29
MDT
Harrisburg
IAD
Washington
$182 Roundtrip, found 1 day ago
$182
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 23 from Harrisburg to Washington, returning Sat, Nov 29, priced at $182 found 1 day ago
United
Sat, Jul 19 - Sat, Jul 26
MDT
Harrisburg
IAD
Washington
$184 Roundtrip, found 5 days ago
$184
Roundtrip
found 5 days ago
Select United flight, departing Sat, Jul 19 from Harrisburg to Washington, returning Sat, Jul 26, priced at $184 found 5 days ago
United
Mon, Jul 14 - Fri, Aug 8
MDT
Harrisburg
IAD
Washington
$189 Roundtrip, found 1 day ago
$189
Roundtrip
found 1 day ago
Select United flight, departing Mon, Jul 14 from Harrisburg to Washington, returning Fri, Aug 8, priced at $189 found 1 day ago
United
Wed, Jul 16 - Fri, Jul 25
MDT
Harrisburg
IAD
Washington
$216 Roundtrip, found 3 days ago
$216
Roundtrip
found 3 days ago
Select United flight, departing Wed, Jul 16 from Harrisburg to Washington, returning Fri, Jul 25, priced at $216 found 3 days ago
United
Mon, Jul 14 - Mon, Jul 21
MDT
Harrisburg
IAD
Washington
$217 Roundtrip, found 5 days ago
$217
Roundtrip
found 5 days ago
Select United flight, departing Mon, Jul 14 from Harrisburg to Washington, returning Mon, Jul 21, priced at $217 found 5 days ago
American Airlines
Wed, Sep 3 - Tue, Sep 16
MDT
Harrisburg
IAD
Washington
$264 Roundtrip, found 3 days ago
$264
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Sep 3 from Harrisburg to Washington, returning Tue, Sep 16, priced at $264 found 3 days ago
Frontier Airlines
Sun, Aug 10 - Fri, Aug 29
MDT
Harrisburg
IAD
Washington
$272 Roundtrip, found 5 days ago
$272
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Aug 10 from Harrisburg to Washington, returning Fri, Aug 29, priced at $272 found 5 days ago
Delta
Mon, Jun 1 - Tue, Jun 9
MDT
Harrisburg
IAD
Washington
$517 Roundtrip, found 3 days ago
$517
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Jun 1 from Harrisburg to Washington, returning Tue, Jun 9, priced at $517 found 3 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $359
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $359
0
Flights from Harrisburg (MDT) to Washington (IAD)
Origin airport
Harrisburg Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$179
Distance
93 mi

Harrisburg to Washington Flights

The cheapest times to fly from Harrisburg to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Harrisburg to Washington are during the month of August. You can find some of the cheapest flights from Harrisburg to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Harrisburg to Washington

Sunday is one of the best days to book for cheap flights from Harrisburg to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Harrisburg to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Harrisburg to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $113 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Harrisburg to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Harrisburg to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD) cost?
Cheap return flights from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD) start at $179. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving MDT on July 19 2025 and touching down at IAD. The price was last updated on July 2 2025 and has not changed since.
What is the cheapest month to fly from MDT to IAD?
The cheapest flights from MDT to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
Hop on a nonstop flight with United Airlines and fly straight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD).
What is the cheapest airline that flies from MDT to IAD?
At the moment, the cheapest airline operating one-way flights from MDT to IAD is United. You can jet off on this route from $204. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from MDT on August 29 2025. Prices were last updated on July 2 2025 and have not changed since.
How many flights per day from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
On average, Harrisburg Intl. Airport (MDT) only has 1 nonstop flight to Washington Dulles Intl. Airport (IAD) each day. For additional options, try our easy-to-use filters. Simply enter your preferred travel dates, then select "1 Stop" or "2+ Stops" to discover flights offering layovers.
What are the most popular departure times for flights from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
More people fly between MDT and IAD at 6 AM than at any other time. Looking for a quieter experience? Travel outside of rush hours and you could save on your ticket as well.
What day of the week has the most flights from MDT to IAD?
If you jet off on a Friday, you'll get the widest range of options for flights from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
The earliest flight taking off from Harrisburg Intl. Airport (MDT) is at around 6:06AM UTC-5. Board this flight and you'll reach Washington Dulles Intl. Airport (IAD) at approximately 7:08AM UTC-5. The overall travel time is 1h 2m.
How long does it take to fly from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
The average flight time from MDT to IAD is 1 hour and 1 minute, covering a distance of 95 mi.
What airline has the least delays from MDT to IAD?
Consider traveling with Lufthansa if you'd like to go straight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD) without any holdups. This carrier has the strongest track record for punctuality, with an on-time score of 100%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
Book a flight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Harrisburg Intl. Airport (MDT)?
Washington Dulles Intl. Airport (IAD) is the only airport in Washington with direct flights from Harrisburg Intl. Airport (MDT). Check out the options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from MDT to IAD right before your journey is typically more expensive. But if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a MDT to IAD flight and hotel package?
Securing a MDT to IAD flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our wide range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harrisburg Intl. Airport (MDT) to Washington Dulles Intl. Airport (IAD)?
In most instances, you can cancel or modify your MDT to IAD flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want further details, go to our Customer Service portal.

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*Available to One Key members.